Not true. Just restore from your recent backup.
You DO make backups, right???
However, if you take regular backups then disconnect the backup device and only reconnect it to restore a file or to do the next backup, then yes, you can restore from there.
I back up regularly to a memory stick that I immediately remove once the backup is done. I NEVER leave it in the port.
Cannot even remember how many people have come into my shop, “my computer won’t boot!!!!”
The hard drive is toast, and they had pictures and such that can’t be replaced....